Gymnogryllus dolichodens

Ma, Libin & Zhang, Yalin, 2011, The cricket genus Gymnogryllus (Grylloidea: Gryllidae: Gryllinae: Gryllini) from China with description of six new species, Zootaxa 2733, pp. 31-40 : 33

Gymnogryllus dolichodens nov. sp.

(Fig. A. 1, 7–9; B. 1, 7; C. 1; D. 1)

Type material. Holotype male, China: Yunnan, Honghe, Jinping, Wendang, 11 Jun. 2009, coll. Libin Ma ( NWAFU). Paratype female: the data same to holotype.

Diagnosis. Male. Frons normal. Epistomal suture wide and straight. Distal edge of labrum narrow and straight. Lateral ocelli rounded and flat. Occiput nearly the same width as anterior pronotum. Pronotum parallel-sided. Oblique veins three with outermost vein near the corner of stridulatory vein. Inner side of mirror slightly bent (strongly bent on covered tegmen, and inner cell besides mirror divided into two by a short longitudinal vein). The cross-vein between the chord and mirror reach to below inside corner of mirror. Inner branches of Cu1 at apical field ten, of them, first and second as well as third and fourth connected at base (on covered tegmen, branches nine, first closing to second at base and fourth dividing into two nearly midway). Forewings slightly overreaching tip of abdomen. Stridulatory file, inside apex apart from hairs, with 55 anvil-like teeth and smaller angular tooth inside. Hind wings long, well beyond tip of cercus. Genitalia: Median notch between paired lower apical teeth reaching dorsal edge of epiphallic apex, and longer than others.

Female. Tegmen somewhat regularly reticulate, longitudinal veins run oblique right and posterior, and transverse crossveins divide them into numeral cells, mainly forming rhombus pattern. Ovipositor very short (3.5 mm), almost straight; superior valves lanceolate, rather acute, inferior ones deeply notched at base of the apical part with a short and acute spine ventrally at base. Otherwise the same as male.

Coloration. Head, pronotum and much of hind femur blackish brown. FWs taupe. Occiput uniform blackish brown. 1/3 part of cheek bottom brown. Frons black. Crescent pattern of pronotum almost uniform blackish brown. 1/4 part of lateral lobe bottom with a light stripe which is distinct in front. The subapex of hind femur with a dark brown patch dorsally.

Measurements. BL 28; HW 7; PL 5.5; PW 7.5; FWL 19.5; FWW 7.5; AFL 10; HWL 8.5; HLL 16; CL 10.5; API 1.33; PI 1.36; NST 56; SFL 4.46; DST 12.

Etymology. The specific epithet “ dolichodens ” refers to the distinctly longer, paired, lower apical teeth of this species.

Distribution and Ecology: Specimens were attracted to light in a village located in south Yunnan Province, China, and adjacent to Vietnam. This village is surrounded by hills; its altitude is about 900m.